Some parts of London. I used to live in a building next to three sets of railways: the tube, regular intercity and express/higher speed intercity. That's a bit too much railway outside the window. And that's not even the worst location, in the New Cross area some residential buildings are sandwiched between railways on all four sides.

Don't get me wrong, I love trains in London, so many trains means I don't need a car, but London has the oldest railway infrastructure in the world and the way they were built in the 19th century makes some areas a total disaster today.

On the other hand, riding a DLR train through a skyscraper is bloody epic!